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No. 29,908. PATENTBD SEPT. 4, 1860. H. PARMBLEE. MLDING METAL PIPES.

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, .Speelcatinirforming part ofLet-lers Patent No. 20,00,.daicd rllember,l.

To CLU whom, 571mgfconcern: rBe it known. that LII. PARMELEEf-of the cityvandcounty of Philadelphia,v State Lof Pennsylvania, .have` invented'. anew and ImiI proved Ma hine for-Forming Molds for the Casting of etal Pipes; and I do hereby declare thefollowing-.to be a full, clearand eXact descriptionfof thesame, referencebeing .had tov vthe accompanying drawings, and to the letters by producing that combined solidity and uniformity in the compression of the material which cannot be attained by thc rammi-ng process heretofore resorted to for the same purpose. Y

In order to enable others to practice my invention, I will now proceed to describe the manner in which I Ycarry it into effect. y On reference to the accompanying drawings, which form a part of this specification, Figure v1 is avertical section of apparatus illustrating my improved process of molding pipes,

die., from. granulated substances; ,Fig.2, a sectional plan on theline 1 2, Fig. l.

A is the frame-work of the apparatus, resting on and secured to a suitable base, B. The lower portion'of the framework consists of a block with a movable front, m, a cylindrical .chamber of lsuch a diameter as to contain a -sucient body of. sand for forming the mold being formed one half in the block. and the other'half in-its front m,--or the cylindrical Achamber' may be formed in a box detachable from. both frame and base.

C is the pattern, resting with its flange a on the base A,ar`id maintainedin a position concentric with the interior. of the cylindrical chamber by the flange which coincides with the said chainber,'or by appliances such as the 4nature of the processjand size'of t-he pattern may suggest as the most convenient.

Dis a vertical pipe, arranged to lit .snugly to and at the isam'e time revolve. and slide -freely on the pattern C. portion of the lower end of this pipeD is cutaway, asshown in Fig. 1, and has. a spiral flange, e, the vdiameterofwhichis suchthat its `edge shall be as -close aslpossible to the insideof the -cylin'- d rical chamber without actually .touching the same, or, at least,.without bearing hard against it. .The top of the pipe D has an enlargement, d,.arrangedto tsiniglyand to turnand slide Y ,freelyin thel cylinder G, which Yturns at the vtop ina bracketJz., and near itslowerend in the bracket ,both brackets being attached to or forming a part of the frame A. A bevelwheel, II,-is secured i'o the cylinder G, and into this wheel gearsa similar Wheel, I, on the spindle J, which turns in the frame A, and which is caused to revolve by means of a handle, K, or any suitableV driving apparatus". A key or feather, F, is attached to the inside, and extends throughoutV the whole length of the cylinder G, this feather being so formedin respect to a recess in. the enlargement d of the pipe D that the latter can in'ove vertically, but cannot revolve independent of the cylinder. The front m ol' the blo'ck is hinged to the latter at n ,andis provided with a 'suitable latch, 1, on unfastening which the front may be'opened, as seen in dotted lines Fig. 2.

Prior to commencing the process of form- -1 ing the mold the lower end of thepipeD rests on the base A. A body of' sand, or other material of which the mold has to be formed, is then deposited in the space which intervenes between the pipe D and the sides of the cylindrical chamber. This pipe'D is now caused to revolve in the direction ol the arrow by turning the shaft J, when the spiral flange e will draw'down the material within the chan1- ber and compress it against the base B. As

the revolving motion of the pipe D is continned and more material deposited lin the K In place of forming the cylindrical chamber 1n a portion of the frame in the manner described, it would be best in most instances to .use a detachable box constructed in a manner well-known to melders, and placed on end on the base B, (with the pattern inside,) to be packed with the sand by the action of the spiral flange, as before described,A after which the box containing the mold-may be removed from the base and the pattern subsequently extracted, The core is made by a vprocess precisely similar to thatabove described.r The cylindrical chamber, however, mustbe of the same diameter as the intended core, the spin dle of which in this case will be represented by the pattern C, a solid mass of sand or other sultable material being compressed tightly round the spindle and forming the core,which is removed from the chamber, and, if no drying be required, is ready-fior yinmnediate apf pllcation to the mold previously completed.

vThe main advantages'omy improvement are a rapidity in the formation of the molds, cores, dmc.. and such a uniformity in the density of the material of which the molds are.

composed as cannot be attained by the "usual ramming process, for it will be observed that as long as there is material enough above the spiral ange e, the same quantity 'of material must nd its Way beneath the ange at every revolution, and, the pressure being the same throughout, there can be no variation in the solidityand uniformity of the mold.

I claim as my invention and desire to secure byfLetters Patentl Forming molds and cores for the casting o cylindrical objects` of metal Vby means vof the pipe D, with its ange e, when the said pipe and flange are caused to revolve in a chamber around any desired object,to rise as the mold or core is being formed, and to impart by its weight the desired solidity and uniformity to the mold or core, as herein set forth.

In testimony whereof I have signed my name v to this specification in the presence'of two subscribing witnesses.

HOMER PARMELE f1. Witnesses:

HENRY HoWsoN,

CHARLES FOSTER, 

